Pump construction



Patented Apr. 3, 1923.

ANDREW H. REED, or rULLERToN, CALIFORNIA.v y

PUMP CONSTRUCTION.

Application inea May 24,

To aZZ whom t may concern Be it known that ANDREW H. REED, a citizen of the United States, residing at Fullerton, inthe. county of Orange and State of California, have invented a new and use` ful Pump Construction, of which the following is a specication.

y This invention relates to pump'construction, and an object vof the invention is to prevent the sanding up of pumps.

The accompanying drawings illustrate the invention:v l

Figure 1 is an elevation, partly in mid section', of a pump embodying the invention.

Fig. 2 is an enlarged longitudinal section of the lower portion of Figure 1.

Fig. 3 is a plan section on the line indicated by 3 3, Fig. 2. D

Fig. t is an elevation, partly in section, of the valve guide.

A working barrel is indicated at 5 and iitting inside thereof is the pump plunger 6. The working barrel 5 is provided at its lower end with a working barrel coupling 7 provided with a valve seat 8, in which is mounted a standing valve 9. Connected with the coupling 7 is a perforated pipe 10, to the lower end of which is attached a valve cage 11 provided with openings 12. To the lower end ofthe valve cage 11 is screwthreaded a valve stem guide 13 which preferably4 projects at 14 above the lower ends of the openings 12. The projecting portion 14: is preferably of frusto conical shape so that sand will readily slide therefrom. The guide 13 is provided at its axis with a bore 15 in which is slidably mounted the stem 16 of a valve 17. The valve 17 is preferably hemispherical and opens downwardly from the port 18, which it normally closes, so that when the valve is open sand will readily discharge through said port.` Surrounding` the stem 16 -between the guide 13 and the valve 17 isa coil spring 19 of relatively low expansive power, the tension of said spring being preferably just sufficient to close the valve when the fluid pressures on opposite sides of the valve yare equal. A comparatively small increase of fluid pressure above the valve over that below the valve is sufcient to o-pen said valve against the pressure of the spring 19.

Connected with the standing valve 9 is a tube 20, commonly known as the pump an- 1922; Serial No. 563,210.

chor. 'The lower end of the anchor QOis spaced from the valve 17. Assuming that the plunger 6 is being recnip'rocated in a well known manner to pump y rund from the well, the invention koperates -spring 19 'will serve tov hold the valve 17 close-d. By reason of this the pipe 10 and tube 20 constitute a gas trapl to minimize the flow of gas into the working barrel, when the pump is installed in an oil well. In the ordinary pump construction, the lower end of the pipe 10 is closed perma-v y nently by a plug so that oil can enter thev pipe 10 only at the upper portion thereof through the perforations. y

It will be understood that the valve 9 remains open, not only while the plunger is making its up-stroke but also during a relatively short movement of the plunger at the beginning of its down-stroke. Until Lthe pressure beneath the lower plunger valve, not shown, is suliicient to open said valve against the pressure of the liquid above it, the column of liquid between the lower plunger valve and the valve 17 will function the same as a rigid rod to push open the valve 17 so as to permit any sand that may have collected'- above the valve 17 to discharge from the pipe 10 through the port 18. Thus, at the beginning of each down stroke of the plunger, the valve 17 will open to permit sand kto discharge, consequently preventing sand from accumulating in the pipe 10 to such a height as to sand up the pump, as occurs when the lower end of the pipe 10 is' permanently closed by a plug in the customary manner, due to the sand plugging the lower end of the tube 20.

vIf it be not desired that the valve 17 open upon each down stroke of thel plunger, the

spring 19 will be made of suilicient strength to prevent said valve being opened bythe diiference between liquid pressures on oppo-A V If the n accumulates on the valve 1T will be discharged from the pipe l0 at suitable intervals by raising the plunger 6 above the working barrel, thus permitting the weight oi the entire liquid column in the pump tubing to be imposed upon the valve 17. This weight being in excess ot' the combined pressures of the liquid outside of the pump and the spring 18 will cause the valve 17 to open? thus permitting the sand to discharge. T hen the pump plunger will be lowered into the working barrel and the pumping operation Continued until it is again desired to discharge sand from the pipe l0.

l claim:

l. n a pump construction, the combination with the standing valve thereof, of a perforated pipe Connected with the standing valve, a valve cage connected with the lower end of the perforated pipe and having open ings in its side and having a port communicating with the pipe, a valve stem guide'conneoted with the valve cage and having an upwardly tapering portion projecting above the lower ends of the valve cage openings,

there being a bore at the aXis of the valve stein Guide, a valve to Close the port and opening downward therefrom and having a steml slidably itting the bore of the guide, and a spring surrounding the valve stem between the guide and valve.

2. ln a pump construction, the combination with the standing valve thereof, of a perforated pipe connected with the standing valve, a valve cage connected with the lower end of the peri'orated pipe and having openings in its side and having a port communicating with the pipe, a valve stem guide connected with the valve cage and having an upwardly tapering portion projecting above the lower ends of the valve cage openings, there being a bore at the axis of the valve stem guide, a hemispherioal valve to Close the port and opening downward therefrom and having a stem slidably fitting the bore oi' the guide, and a Spring surrounding the valve stern between the guide and valve.

Signed at Los Angeles, California, this 16th day of May, 1922.

ANDREW H. REED. 

